{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "318437",
    "entityType": "User",
    "nonce": "0x1772175b2d6fd5bdcb17de65f2456df9ff862f80f18b28764e9d8a5720e7e68c",
    "signature": "0xd17b89881c773a6edf131a640e7c048fe480f7db2fd342820368abbfca6699e01b8b24a2f03493be065214e35416721dc22323b762da827ed95258633068b4361c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}